Wrench.



PATENTED DEG. 5, 1905.

fR. MOMILLEN.

WRENCH.

APPLICATION FILED JUNE 23.1905.

*UNITED sTATEs PATENT oEEroE.

ROBERT Mch/IILLEN,` OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONEfy j FOURTH TOFRANK CLMENS, .OF PITTSBURG, PENNSYLVANIA.,

4 'f VWREN'CH." i l and useful' Improvements in Wrenches, of(

which' the following is a specification, reference being had therein to the accompanying drawings. l

This invention relates to that class of wrenches wherein the grip or holdof the jaws is augmented bysan appreciable movement i l of the adjustable jaw toward the fixed jaw,

this movement being veffected by the handhold of the operatorwhen using thewrench.

The object ofthe invention is to simplify, improve, and render more efficient the type ofwrench referred to and at the same time to so construct the wrench that it may be operated in comparatively inaccessibleplaces.

In the accompanying drawings, Figure 1 is a side elevation o'f the improved wrench,

the ran eof the clamping movement of the adjusta `le jaw being indicated in dotted lines. Fig. 2 is a longitudinal sectional view. Fig. 3 is an edge view. Fig. 4 is a detail view of the fulcrum-dog. j

Referring to the drawings, 2 designates the pole of the wrench, and 3 the xed jaw at the outer end thereof.

4 is the adjustable jaw, which is recessed to slide on pole 2 in the usual manner, and

projecting therefrom along the front edge of pole 2 is bar 5. The bar is preferably formed separate fromthe aw and is secured in a recess therein by a pin 5.

6 designates a hand -lever of inverted-L form, having a passage through its short angle 6 through which pole 2 extends, the extremity 0f portion 6 being recessed to receive the inner end of bar. 5, to which it is securedby pivot-pin 7. The inner edge of lever 6 is recessed or hollow, and formed therein in the relatively heavy metal occurring at thebend or angle of the lever is'the rounded seat or depression 8, and pivoted in this de ression on in 9 is the rounded extremity 10 of dog 10. eeth 11 on the outer edge of the free end of this dog interlock with similar teeth 2 on the back edge of pole 2, the lengagement being maintained by leaf-spring 12, carried bylever 6. Teeth 11 and 2' are preferably of ratchet form, so that when moving j aw 4 inward to a desired adjustment teeth 11 will readilyslip Specification of fLetters Patent.

- Application filed June 23,1905. Serial No. 266,585.

over teeth 2 without holding the dog disengaged. For an opposite adjustment the dog is provided with thumbiece 13,whereby it may be conveniently he d disenga ed when Patented mab, 1,905.

stances only a portion of the movement ives the` tightest possible grip, `and as a l or practically all of the force required to turn thewrench may be a plied through lever 6 it will be understood tih ject being turned ismost secure, the extent thereof being in proportionto the force required in turning the wrench. Lever 6 is constructed withv special reference to, withstanding the force transmitted through it,

and for this reason the rounded depression 8 is provided for receiving the rounded dog end 10 ,V thereby -'relieving pivot 9,' and for the same reason the strong interlocking connections are rovided between the bar 5 and the lever an the movable jaw. When the gripping andV turning force is applied, the pressure is communicated directly from lever 6 to dog 10, and with the' dog lying close to pole 2 and 'havin secureinterlocking engagement therewit the construction is very strong and capable of resisting any reasonable amount of force.

at the grip'on the ob-l The wrench may be manipulated without having access to either the movable jaw or the inner portion of lever 6, so that it may be projected into and eectually used in inac- While I have here shown aws having faces of l conventional' form for gripping nuts and other angular objects, it will be understood that jaws of such other forms may be provided as are best suited for pipes and other circular or curved objects.

I claim- 1'. A wrench comprising a pole, a jaw fixed'Y thereto, a jaw movable on the pole, lever 6 IOO formed with the integral lateral extension 6 having a pole-passage, a connection between the lever and movable jaw, and a detachable pirotal connection between the lever and the po e.

2. A Wrench comprising a pole, a jaw fixed thereto, a jaw movable on the pole, lever 6 formed with the integral lateral extension 6 having a pole-passage, said passage being of such form as to aiord the lever slight oscillation, the extremity of extension 6 being recessed, bar 5 at one end fitting said recess and at its opposite end secured to the movable jaw, and a dog pivoted to the lever for detachably engaging the pole. i

3. A wrench comprising a pole, a jaw fixed thereto, a jaw movable on the pole, a lever -having a pole-passage, a connection between the lever and the movable jaw,the lever being formed with a rounded depression, a dog having a rounded extremity pivoted in said depression, and a spring for holding the -free portion of the dog normally in engagement with the pole.

4. A wrench comprising a pole, a jaw fixed thereto, a jaw movable on the pole, a lever having a lateral extensionformed with a polepassage, a connection between the lever extension and the movable jaw, the inner face of the lever on the side of the pole opposite said connection being formed with a rounded depression, a dog having a rounded extremity pivoted in said depression, the dog extending toward the outer end of the pole, cooperating teeth formed on the dog and the pole, and a spring carried by the lever for holding the dog normally in engagement with the pole.

5. A wrench comprising a pole having teeth formed on its rear edge, a jaw fixed to the pole, a j aw slidable on the pole, the sliding jaw being recessed, a bar secured in said recess and extending outwardly along the front edge of the pole, a lever having a lateral oifset formed with a pole-passage, the extremity of the lever-offset being recessed to receive the outer end of said bar, a pivot for securing said bar end in said lever-recess, the inner Face of the lever at the opposite edge of the pole being recessed and formed with a rounded depression, a dog having a rounded extremity pivoted in said depression, the do@ extending toward the outer end of the pdle and formed with teeth for cooperating with the pole-teeth, and a spring carried by the lever for holding the dog normally in engagement with the pole.

In testimony whereof I aHix my signature in presence of two witnesses.

ROBERT MCMILLEN.

Witnesses:

J. M. NEsBrr, VINNIE M. MYERS. 

